CN111938865B - Filter-related vein hyperplasia intima cutting catheter - Google Patents
Filter-related vein hyperplasia intima cutting catheter Download PDFInfo
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- CN111938865B CN111938865B CN202010756380.7A CN202010756380A CN111938865B CN 111938865 B CN111938865 B CN 111938865B CN 202010756380 A CN202010756380 A CN 202010756380A CN 111938865 B CN111938865 B CN 111938865B
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- cutting knife
- cutting
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- 206010020718 hyperplasia Diseases 0.000 title claims abstract description 16
- 210000003462 vein Anatomy 0.000 title description 9
- 229910052751 metal Inorganic materials 0.000 claims abstract description 71
- 239000002184 metal Substances 0.000 claims abstract description 68
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims abstract description 24
- 238000009423 ventilation Methods 0.000 claims abstract description 24
- 238000001990 intravenous administration Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 6
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- 230000007704 transition Effects 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
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- 230000000694 effects Effects 0.000 description 7
- 210000001631 vena cava inferior Anatomy 0.000 description 7
- 230000035755 proliferation Effects 0.000 description 6
- 208000010378 Pulmonary Embolism Diseases 0.000 description 4
- 206010051055 Deep vein thrombosis Diseases 0.000 description 3
- 206010047249 Venous thrombosis Diseases 0.000 description 3
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/01—Filters implantable into blood vessels
Abstract
The invention relates to the technical field of medical appliances, in particular to a filter-related intravenous hyperplasia intima cutting catheter; the invention comprises a conduit, wherein a handheld pipe is fixedly arranged on the outer wall of one end of the conduit, a spiral wire groove is formed in the pipe body of the conduit, a memory alloy wire is arranged in the wire groove, a metal pipe head is fixedly arranged at the other end of the conduit, a valve is arranged on the inner wall of the metal pipe head, which is close to one end of the conduit, a circular cutting knife is further arranged on the inner wall of the metal pipe head, and a group of first pressure balance ventilation grooves and a group of second pressure balance ventilation grooves are respectively formed in the inner wall of the metal pipe head along the middle axis direction of the metal pipe head; the invention can effectively solve the problems that in the prior art, a doctor takes out the filter from the patient, the filter is difficult to take out, the pipe orifice at the bottom of the recovery catheter is easy to be deformed by the filter support, the proliferated tissue fragments on the filter can fall back into the patient, the recovery catheter cannot be deformed according to actual needs, and the recovery catheter is difficult to be held by the doctor.
Description
Technical Field
The invention relates to the technical field of medical appliances, in particular to a filter-related intravenous hyperplasia intima cutting catheter.
Background
Deep venous thrombosis is a common disease which is harmful to human health, and due to the aging and the rising of incidence rate year by year, serious complications of pulmonary arterial embolism, pulmonary infarction and extremely high mortality rate can be caused by falling off of deep venous thrombosis of lower limbs along with the blood flow direction to the heart besides serious limb swelling, varicose vein of lower limbs and venous ulcer, so that the life of patients is seriously endangered. The traditional operation treatment is that after pulmonary artery embolism occurs, thoracopulmonary artery incision is performed to remove the thrombus, the wound is large, and the risk is high. Due to advances in endoluminal technology, vena cava filters have been currently placed into the inferior vena cava as the only invasive means of preventing pulmonary embolism. The inferior vena cava filter is put in by adopting a percutaneous puncture method, and a metal filter is put in the inferior vena cava through a catheter conveyer, so that the filter can prevent massive thrombus from ascending, prevent the occurrence of fatal pulmonary embolism or reduce the occurrence of pulmonary arterial embolism. Percutaneous vena cava filter placement is simple, safe, and effective compared to conventional surgical procedures, and has been widely used in recent years.
At present, the filter has more types, mainly a temporary filter and a permanent filter are used in the early stage, but because the permanent inferior vena cava filter is kept in the body for a long time and possibly secondary to serious complications such as inferior vena cava thrombosis, filter displacement and the like, the recyclable filter can be used as the temporary filter and also can be kept in the body as the permanent filter, and meanwhile, the recyclable filter can be kept in the body for 2-3 weeks, so that the occurrence of pulmonary embolism of a patient in the acute stage of deep vein thrombosis is avoided, the long-term retention risk of the permanent inferior vena cava filter is avoided, and the filter is beneficial to the patient unsuitable for the long-term retention of the inferior vena cava filter. Accordingly, vena cava filters are increasingly used in clinic.
Current medical practice traditional Chinese medicine generally follows the technical specifications that the filter is removed 10-12 days after the filter is implanted in the patient, and in the prior art, there are generally two ways for a doctor to remove the filter from the patient:
in the first mode, one end of the recovery catheter is extended to a position near the filter in the vein by a doctor, then the doctor extends into the recovery catheter by using a gun-shaped surgical forceps, the top of the filter is clamped by the surgical forceps, then the doctor pulls the surgical forceps outwards so that the filter is pulled into the recovery catheter, and finally the filter is taken out by the recovery catheter;
in the second mode, one end of the recovery catheter is inserted into the position near the filter in the vein by the doctor, then the doctor penetrates the inner tube with the tube diameter smaller than that of the recovery catheter into the recovery catheter, then the doctor stretches the guide wire into the inner tube, then the doctor controls the bottom end of the guide wire to sleeve the hook at the top of the filter, then the doctor carefully advances the inner tube into the patient until the tube opening at the bottom of the inner tube and the hook are tightly propped, then the doctor keeps the state that the hook and the tube opening at the bottom of the inner tube are tightly propped and outwards withdraws the inner tube and the guide wire until the filter is completely withdrawn into the recovery catheter.
However, physicians often encounter the following difficulties in removing filters from patients using the conventional methods described above:
first, because the filter produces different degrees of proliferation tissue on the intravenous membrane where the filter is located during the patient's residence, the proliferation tissue also adheres to the filter, which makes it difficult for the physician to withdraw the rate into the recovery catheter because the orifice of the recovery catheter cannot effectively cut and separate the proliferation tissue when the physician withdraws the filter into the recovery catheter;
secondly, the head of the existing recovery catheter is softer, and when a doctor pulls a guide wire or a surgical forceps outwards, a pipe orifice at one end of the recovery catheter, which is positioned in a patient, can be deformed by a filter support, so that secondary injury is caused to the patient when the doctor withdraws the recovery catheter from the patient;
thirdly, when the doctor withdraws the filter into the recovery catheter, the proliferated tissue fragments attached to the filter have the risk of being rubbed against the inner wall of the recovery catheter and falling back into the vein of the patient;
fourth, existing recovery catheters do not change their shape well according to the actual condition of the patient and hold the shape reliably because some patients have defects in their body construction or differences in the location of the implanted filter, which results in certain inconveniences when using a conventional straight recovery catheter;
fifth, the top of the existing recovery catheter is relatively slim and smooth, which is not conducive to reliable handling of the recovery catheter by a physician.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects existing in the prior art, the invention provides the filter-related intravenous hyperplasia intima cutting catheter, which can effectively solve the problems that in the prior art, a doctor takes out the filter from a patient, the mouth of the bottom of the recovery catheter is easily deformed by the filter support, the hyperplasia tissue fragments on the filter possibly fall back into the patient, the recovery catheter cannot be deformed according to actual needs, and the recovery catheter is not easily held by the doctor.
Technical proposal
In order to achieve the above purpose, the invention is realized by the following technical scheme:
the utility model provides a relevant vein hyperplasia intima cutting pipe of filter, includes the pipe, fixed handheld pipe that is provided with on the outer wall of pipe one end, the heliciform silk groove has been seted up to the pipe inside of pipe, be provided with the memory alloy silk that matches with it in the silk inslot, the fixed metal tube head that is provided with of the other end of pipe with it matches, the metal tube head is fixed with the valve that matches with it on being close to the inner wall of pipe one end, still be fixed with annular cutting knife on the inner wall of metal tube head, the shape of cutting knife is wide down narrow form, the bottom of the directional metal tube head of edge of a knife direction, the inside of cutting knife still pegging graft with the protection ring body that matches with it, protection ring body shape is similar with the cutting knife shape to the bottom of protection ring body is blunt mouth form, the top plane symmetry of protection ring body is fixed with a pair of ear platform, all set up the circular logical groove on the horizontal direction on the ear platform, set up a set of first pressure balance groove, a set of second pressure balance groove on the inner wall along wherein on the inner wall of metal tube head is close to the inner wall of metal tube head, a set of pressure balance groove, a set of second pressure balance groove and the inner wall on the inner wall of metal tube head and the inner wall that is in the pressure balance groove on the two ends of the metal tube head are in the two ends of the valve on the two pressure balance groove and the inner wall between the two pressure balance groove and the two on the metal tube head and the pressure balance groove respectively.
Furthermore, the material of the guide tube is the same as the material of the tube body of the soft endoscope.
Furthermore, the two ends of the handheld pipe are respectively provided with an anti-falling convex ring body, and the outer wall of the handheld pipe is uniformly provided with anti-skidding patterns.
Further, the wire grooves are uniformly formed in the whole pipe body of the catheter.
Still further, the memory alloy wire is a single pass shape memory alloy of the type used with the memory alloy wire and has a transition temperature of not less than 40 degrees celsius.
Further, the metal tube head is made of corrosion-resistant metal or alloy materials.
Furthermore, the valve is made of silica gel or rubber.
Furthermore, the plane of the edge of the bottom end of the cutting knife is kept level with the plane of the pipe orifice of the bottom end of the metal pipe head, and the plane of the top of the cutting knife is symmetrically provided with a pair of slots.
Furthermore, the plane at the bottom end of the protection ring body is kept flush with or exceeds the plane at the bottom end of the cutting knife, and a pair of inserted bars matched with the slots are symmetrically and fixedly arranged on the outer wall of the protection ring body, which is in fit contact with the cutting knife.
Furthermore, the first pressure balance ventilation grooves and the second pressure balance ventilation grooves are equal in number, and the first pressure balance ventilation grooves and the second pressure balance ventilation grooves are distributed on the metal pipe head in a circumferential array mode by taking the central axis of the metal pipe head as a symmetry axis.
Advantageous effects
Compared with the known public technology, the technical scheme provided by the invention has the following beneficial effects:
1. according to the invention, the metal tube head matched with the catheter is fixedly arranged at the other end of the catheter, the annular cutting knife is fixedly arranged on the inner wall of the metal tube head, the shape of the cutting knife is in a shape of being wide at the upper part and narrow at the lower part, the knife edge direction of the cutting knife points to the bottom of the metal tube head, and the knife edge plane at the bottom end of the cutting knife is kept flush with the tube orifice plane at the bottom end of the metal tube head, so that the effect of effectively reducing the difficulty in taking out the filter caused by the proliferation of tissues is achieved.
2. According to the invention, the other end of the catheter is fixedly provided with the matched metal tube head, the inner wall of the metal tube head is fixedly provided with the annular cutting knife, and the metal tube head is made of corrosion-resistant metal or alloy materials, so that the effect that a doctor can effectively avoid the filter from stretching and deforming the bottom tube orifice of the catheter when the filter is drawn back into the catheter is achieved.
3. According to the invention, the metal tube head matched with the metal tube head is fixedly arranged at the other end of the catheter, the valve matched with the metal tube head is fixedly arranged on the inner wall of the metal tube head close to one end of the catheter, the annular cutting knife is fixedly arranged on the inner wall of the metal tube head, the shape of the cutting knife is in a shape of being wide at the upper part and narrow at the lower part, and the knife edge direction of the cutting knife is directed to the bottom of the metal tube head, so that the effect of effectively preventing the proliferation tissue fragments on the filter which are drawn back into the catheter from falling back into a patient body is achieved.
4. The invention adds the spiral wire groove in the pipe body of the catheter, the memory alloy wire matched with the wire groove is arranged in the wire groove, the wire groove is uniformly arranged in the whole pipe body of the catheter, the type of the memory alloy adopted by the memory alloy wire is single-way shape memory alloy, and the jump temperature of the memory alloy wire is not lower than 40 ℃, thereby achieving the effect of enabling doctors to bend the catheter to a specified shape according to actual conditions quickly and conveniently.
5. According to the invention, the outer wall of one end of the catheter is fixedly provided with the handheld tube, both ends of the handheld tube are respectively provided with the anti-falling convex ring bodies, and the outer wall of the handheld tube is uniformly provided with the anti-skid patterns, so that the effect that a doctor can reliably and stably hold the catheter is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a pictorial view of the present invention at a first viewing angle;
FIG. 2 is a pictorial view of the present invention at a second view angle;
FIG. 3 is a pictorial view of the metal tip and conduit of the present invention shown separated from one another at a first view angle;
FIG. 4 is a pictorial view of the present invention with the catheter partially cut away and the memory alloy wire removed at a first view angle;
FIG. 5 is an enlarged view of area A of FIG. 4;
FIG. 6 is an enlarged view of area B of FIG. 4;
FIG. 7 is a schematic view of the internal structure of the metal header of the present invention, partially cut away, at a third view angle;
FIG. 8 is an exploded view of the present invention with the cutting blade and the protective ring body partially cut away at a third view angle;
FIG. 9 is a pictorial view of the first and second pressure equalization ventilation slots of the present invention shown with the metal tip partially sectioned at a third view;
FIG. 10 is an enlarged view of region C of FIG. 8;
reference numerals in the drawings represent respectively: 1-a catheter; 2-a hand-held tube; 3-silk groove; 4-a memory alloy wire; 5-a metal tube head; 6-valve; 7-cutting knife; 8-protecting ring body; 9-ear stand; 10-circular through grooves; 11-a first pressure equalization aeration tank; 12-a second pressure equalization aeration tank; 13-an anti-falling convex ring body; 14-anti-skid patterns; 15-slots; 16-insert rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention is further described below with reference to examples.
Examples
A filter-associated venous hyperplasia intimal cutting catheter of this embodiment, reference is made to figures 1-10: the device comprises a guide pipe 1, wherein a handheld pipe 2 is fixedly arranged on the outer wall of one end of the guide pipe 1, a spiral wire groove 3 is formed in the pipe body of the guide pipe 1, a memory alloy wire 4 matched with the wire groove 3 is arranged in the wire groove 3, and a metal pipe head 5 matched with the other end of the guide pipe 1 is fixedly arranged at the other end of the guide pipe 1; the inner wall of the metal tube head 5, which is close to one end of the catheter 1, is fixedly provided with a valve 6 matched with the metal tube head, wherein the valve 6 has the function that when a doctor uses a guide wire to recycle the filter into the catheter 1, the proliferated tissue fragments cut by the cutting knife 7 on the filter cannot fall into the vein of a patient again due to friction with the inner wall of the catheter 1; the inner wall of the metal tube head 5 is also fixedly provided with a circular cutting knife 7, the shape of the cutting knife 7 is in a shape with a wide upper part and a narrow lower part, the edge direction of the cutting knife 7 points to the bottom of the metal tube head 5, the inside of the cutting knife 7 is also inserted with a protection ring body 8 matched with the cutting knife 7, the shape of the protection ring body 8 is similar to that of the cutting knife 7, the bottom of the protection ring body 8 is in a blunt mouth shape, the top plane of the protection ring body 8 is symmetrically and fixedly provided with a pair of ear platforms 9, the ear platforms 9 are respectively provided with a circular through groove 10 in the horizontal direction, the inner wall of the metal tube head 5 is respectively provided with a group of first pressure balance ventilation grooves 11 and a group of second pressure balance ventilation grooves 12 in the middle axis direction, and the first pressure balance ventilation grooves 11 and the second pressure balance ventilation grooves 12 are not conducted with each other, the notch at two ends of the first pressure balance ventilation grooves 11 are respectively arranged on the inner wall of the metal tube head 5 at the upper end of the valve 6 and the inner wall of the metal tube head 5 near the bottom of the metal tube head 5, and the notch at two ends of the second pressure balance grooves 12 are respectively arranged on the inner wall of the metal tube head 5 between the valve 6 and the metal tube head 7.
The catheter 1 is made of the same material as the tube body of the soft endoscope, and the tube body of the endoscope has good smoothness, so that the damage to the body of a patient can be reduced as much as possible when a doctor punctures the catheter 1 into the body of the patient, and meanwhile, the soft catheter 1 can enable the doctor to bend the catheter 1 into a required shape according to the needs.
The two ends of the handheld tube 2 are provided with the anti-falling convex ring bodies 13, the outer wall of the handheld tube 2 is uniformly provided with the anti-skidding lines 14, and the design can enable a doctor to better hold the top of the catheter 1, so that the operation stability of the doctor in the process of taking out the filter in the patient is improved.
The wire grooves 3 are uniformly formed in the whole pipe body of the catheter 1, so that the memory alloy wires 4 can be lined in the whole catheter 1, and the memory alloy wires 4 have a shaping effect on the whole catheter 1.
The memory alloy wire 4 adopts a single-pass shape memory alloy, so that a doctor can deform the catheter 1 at a lower temperature according to actual needs before performing a filter extraction operation on a patient (deformation refers to bending the catheter 1 at a certain angle), and after the operation is finished, the doctor heats the catheter 1 to a temperature above the transition temperature (the transition temperature refers to the transition temperature of the memory alloy wire 4 in the inner lining of the catheter 1) so as to restore the catheter 1; the jump temperature of the memory alloy wire 4 is 45 ℃, and the body temperature of a normal person is 37 ℃, so that the memory alloy wire 4 in the liner of the catheter 1 can be ensured not to react to restore when the catheter 1 is punctured in a patient, and the jump temperature environment of 45 ℃ is easy to realize for doctors.
The metal tube head 5 is made of titanium alloy material, and the titanium alloy material has the advantages of light weight, high specific strength, good corrosion resistance and the like.
The valve 6 is made of silica gel, and the silica gel has the advantages of good structural stability, good insulativity, good durability, good plasticity, stable chemical properties and the like.
The plane of the knife edge at the bottom end of the cutting knife 7 is kept flush with the plane of the pipe orifice at the bottom end of the metal pipe head 5, so that the proliferation tissue attached to the filter can be effectively ensured to be cut off by the cutting knife 7, and meanwhile, the cutting knife 7 cannot cut other tissues or vein blood vessel walls of the cutting knife 7, thereby improving the safety of the product in use; the top plane of the cutter 7 is also symmetrically provided with a pair of slots 15.
The plane at the bottom end of the protection ring body 8 is kept level with the plane at the edge of the bottom end of the cutting knife 7, so that when a doctor moves the inner tube or the guide wire in the catheter 1 when the protection ring body 8 is inserted on the cutting knife 7, the edge of the cutting knife 7 cannot cut the surface of the guide wire (because the surface of the guide wire is covered with a polytetrafluoroethylene coating) or the inner tube (because the inner tube is usually made of materials such as plastics or rubber); a pair of inserting rods 16 matched with the inserting grooves 15 are symmetrically and fixedly arranged on the outer wall of the protective ring body 8, which is in fit contact with the cutting knife 7.
The number of the first pressure balance ventilation slots 11 and the number of the second pressure balance ventilation slots 12 are equal, and the first pressure balance ventilation slots 11 and the second pressure balance ventilation slots 12 are distributed on the metal tube head 5 in a circumferential array manner by taking the central axis of the metal tube head 5 as a symmetry axis, so that when a doctor punctures the catheter 1 into a patient, air in the metal tube head 5 can be discharged from the first pressure balance ventilation slots 11 and the second pressure balance ventilation slots 12 to the outside.
Preparation work before use:
firstly, a doctor deforms the catheter 1 to a specified shape at a lower temperature (the lower temperature refers to the temperature being lower than the jump temperature of the memory alloy wire 4) according to actual needs;
secondly, taking out a wire rope (the length of the wire rope is at least 2.5 times of the length of the catheter 1) by a doctor, and then respectively tying two ends of the wire rope on two earpieces 9 on the protective ring body 8 by the doctor;
and thirdly, the doctor aligns two inserting rods 16 at the bottom of the protection ring body 8 with two inserting grooves 15 at the top of the cutting knife 7, and inserts the protection ring body 8 on the cutting knife 7 (at the moment, the inserting rods 16 are inserted into the corresponding inserting grooves 15).
When in use, the utility model is characterized in that:
firstly, a doctor punctures the catheter 1 into a patient, and the position of the metal tube head 5 is positioned near the position of the filter in the vein;
secondly, the doctor stretches the inner tube into the catheter 1, and the inner tube is positioned near the position where one end of the patient body is near the filter;
thirdly, the doctor stretches the guide wire into the inner tube, and the guide wire is sleeved on a hook at the top of the filter;
fourthly, the doctor pushes the inner tube into the patient until the tube orifice at one end of the inner tube in the patient is tightly propped against the hook at the top of the filter;
fifthly, the doctor uses one hand which does not hold the handheld tube 2 to buckle the middle part of the wire rope, and then the doctor pulls the wire rope outwards to enable the protection ring body 8 to withdraw from the cutting knife 7, so that the cutting knife 7 leaks out of the knife edge;
sixth, the doctor pulls the inner tube and the guide wire outwards at the same time until the filter is retracted into the catheter 1 (in the process, the proliferated tissue attached to the filter is cut by the cutter 7, so that the proliferated tissue is separated from the wall of the intravenous membrane) and is taken out of the patient;
seventh, the doctor removes the catheter 1 from the patient.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A filter-associated venous hyperplasia intima cutting catheter comprising a catheter, characterized in that: the outer wall of one end of the guide pipe is fixedly provided with a handheld pipe, the inside of the pipe body of the guide pipe is provided with a spiral wire groove, a memory alloy wire matched with the wire groove is arranged in the wire groove, the other end of the guide pipe is fixedly provided with a metal pipe head matched with the metal pipe head, the inner wall of the metal pipe head, which is close to one end of the guide pipe, is fixedly provided with a valve matched with the metal pipe head, the inner wall of the metal pipe head is also fixedly provided with a circular cutting knife, the shape of the cutting knife is in a shape of being wide at the upper part and narrow at the lower part, the knife edge direction of the cutting knife points to the bottom of the metal pipe head, the inside of the cutting knife is also spliced with a protection ring body matched with the cutting knife, the shape of the protection ring body is similar to that of the cutting knife, the bottom of the protection ring body is in a blunt mouth shape, and the top plane of the protection ring body is symmetrically and fixedly provided with a pair of ear tables, circular logical groove on the horizontal direction has all been seted up on the ear platform, a set of first pressure balance ventilation groove, a set of second pressure balance ventilation groove have been seted up respectively on the inner wall of metal tube head along its axis direction, and each other do not switch on between first pressure balance ventilation groove and the second pressure balance ventilation groove, the notch at first pressure balance ventilation groove both ends is seted up respectively on the inner wall of metal tube head that is in the valve upper end, is close to on the inner wall of metal tube head bottom, the notch at second pressure balance ventilation groove both ends is seted up respectively on the inner wall of metal tube head that is in the valve upper end, on the inner wall of metal tube head between valve and the cutting knife, the material of pipe is the same with soft endoscope's body material, hand-held pipe both ends all are equipped with anti-disengaging convex ring body, evenly be equipped with the anti-skidding line on the outer wall of hand-held pipe.
2. The filter-associated venous hyperplasia intima cutting catheter of claim 1 wherein said wire grooves are uniformly open throughout the interior of the catheter body.
3. A filter-associated venous hyperplasia intima cutting catheter as claimed in claim 1, wherein the memory alloy wire is of the single pass shape memory alloy type and the transition temperature of the wire is not less than 40 degrees celsius.
4. A filter-associated venous hyperplasia intima cutting catheter as recited in claim 1, wherein said metal tip is formed of a corrosion resistant metal or alloy material.
5. The filter-associated venous hyperplasia endomembrane cutting catheter of claim 1, wherein the valve is made of silica gel or rubber.
6. The catheter for cutting a filter-associated intravenous hyperplasia intima of claim 1 wherein the plane of the edge of the bottom end of the cutter is flush with the plane of the orifice of the bottom end of the metal tube head, and the top plane of the cutter is also symmetrically formed with a pair of slots.
7. The catheter for cutting a membrane associated with a venous hyperplasia of a filter according to claim 6, wherein the plane of the bottom end of the protecting ring body is flush with or exceeds the plane of the edge of the bottom end of the cutting knife, and a pair of inserted bars matched with the slots are symmetrically and fixedly arranged on the outer wall of the protecting ring body, which is in fit contact with the cutting knife.
8. The filter-associated venous hyperplasia intima cutting catheter of claim 1 wherein the first and second pressure equalization air-exchange slots are equal in number and are each distributed in a circumferential array on the metal tip with the central axis of the metal tip as the axis of symmetry.
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| CN202010756380.7A CN111938865B (en) | 2020-07-31 | 2020-07-31 | Filter-related vein hyperplasia intima cutting catheter |
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| CN202010756380.7A CN111938865B (en) | 2020-07-31 | 2020-07-31 | Filter-related vein hyperplasia intima cutting catheter |
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| CN111938865B true CN111938865B (en) | 2024-03-08 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109730801A (en) * | 2018-12-19 | 2019-05-10 | 先健科技(深圳)有限公司 | Filter recyclable device |
| CN209347767U (en) * | 2018-11-28 | 2019-09-06 | 中山市泰诺医疗器械有限公司 | It is a kind of to use duck-beak type check valve retention enema anal canal |
| CN211023321U (en) * | 2019-11-15 | 2020-07-17 | 刘丽萍 | Recoverable esophagus metal support adjuster |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7678128B2 (en) * | 2001-06-29 | 2010-03-16 | Advanced Cardiovascular Systems, Inc. | Delivery and recovery sheaths for medical devices |
| US20060173490A1 (en) * | 2005-02-01 | 2006-08-03 | Boston Scientific Scimed, Inc. | Filter system and method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209347767U (en) * | 2018-11-28 | 2019-09-06 | 中山市泰诺医疗器械有限公司 | It is a kind of to use duck-beak type check valve retention enema anal canal |
| CN109730801A (en) * | 2018-12-19 | 2019-05-10 | 先健科技(深圳)有限公司 | Filter recyclable device |
| CN211023321U (en) * | 2019-11-15 | 2020-07-17 | 刘丽萍 | Recoverable esophagus metal support adjuster |
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